Surveys

Underwater operations 06 thru 12 dec by M/V yokosuka with submersible in area between 23-30N 25-30N and…

Western North Pacific · Japan · Nampo Shoto · HYDROPAC 3409/12

issued: 2012-12-02 11:49Z
status: cancelled 2012-12-13 00:01Z (archive)
authority: NAVAREA XI 800/12 011141Z DEC 12.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
JAPAN.
NAMPO SHOTO.
1. UNDERWATER OPERATIONS 06 THRU 12 DEC BY
   M/V YOKOSUKA WITH SUBMERSIBLE
   IN AREA BETWEEN
   23-30N 25-30N AND 143-00E 144-30E.
   ALTERNATE AREAS BETWEEN:
   A. 31-00N 33-40N AND 140-30E 143-00E.
   B. 28-00N 30-00N AND 142-00E 143-30E.
2. CANCEL THIS MSG 13 DEC 12.

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Surveys

Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.